#include<iostream>
using namespace std;


//函数的常见样式
//1，无参无返
void test01()
{
    cout<<"this is test01"<<endl;
}
//2，有参无返

void test02( int a)
{
    cout<<"this is test02 a = "<<a<<endl;
}
//3，无参有返

int test03()
{
    cout<<"this is test03 ="<<endl;
    return 1000;
}
//4，有参有返
  int test04(int a)
{
    cout<<"this is test04 a="<<a<<endl;
    return a;
}

int main()
{
    //无参无返的函数调用
    test01();

    //有参无返函数调用
    test02(100);

    //无参有返的函数调用
    int num1 = test03();
    cout<<"num1="<<num1<<endl;

    //有参有返函数调用
    int num2 = test04(10000);
    cout<<"num2="<<num2<<endl;


    system("pause");
    return 0;
}